Quartus closing on its own - Quartus closing on its own Quartus is closing on its own when I open a project. I have tried uninstalling and installing Quartus many times. But the problem persists. I have installed Quartus prime lite edition. version 21.1 for Windows. My OS specifications: Edition Windows 11 Pro Version 21H2 OS build 22000.527 Replies: Re: Quartus closing on its own You can try older version of Quartus prime lite edition. I'm using ver. 20.1 and my OS is windows 11. It works fine for me. Replies: Re: Quartus closing on its own It sounds like a bad Quartus install. Do a full uninstall and reinstall. Maybe try a different location. Replies: Re: Quartus closing on its own I have installed cyclone IV device .qdz file. Regarding creating new projects, I had created them in the many runs when I was uninstalling and installing Quartus. Now in the current installation I am not able to create projects as well. It is just stuck and showing not responding message when I try to create a new project. Replies: Re: Quartus closing on its own Are you still able to create a new project with the New Project Wizard? Did you install the .qdz file for the device family you are using? Replies: Re: Quartus closing on its own I deleted the db folder, there is no incremental_db folder. Still Quartus is closing as soon as I click the open project button. This is happening even before I can select any project to open. Replies: Re: Quartus closing on its own Try deleting the db and incremental_db folders for your project. Then reopen to see if that fixes it.